Electric radiatory stove.



G. EGLY.

ELECTRIC RADIATORY STOVE.

APPLICATION FILED 00127, 1910.

Patented June 6, 1911.

d j 1illu1v 1.. l z 4 M 7 4 w b \N N To all whom it may concern:

NI ED PATENT- OFFICE.

GEORG EGLY, OF TREPTOWpNEAR *ER-LIN, GERMANY, ASSIGNOR TO GEDRtTEDEEsmivrn'irs & cd, or BERnIn; GERMANY.

ELECTRIC. RADIATORY' STOVE.

. I I a Be it known that I, Gnone EGLY, a subject of the German Emperor,and residing at Treptow, near Berlin, Germany, haveinvented certain newand useful Improve ments in Electric Radiatory Stoves, of which thefollowing is a specification.

My invention relates generally to electric radiatory stoves,andparticularly to electric radiators therefor substantially consistingof a non-metallic, highly refractory, good heat-conducting, protectivetube, in which a rod is heated.

Important objects of my invention are to prevent the heating-rod in aradiator of this type changing its shape owing to the heat,

and to prevent air entering into the protective tube surrounding theheating-rod, so that the latter cannot-burn away too rapidly. To theseends, the rod is carried by its ends in long, electrically-oonductinsleeves, but so, however, that it can expand freely longitudinally inboth directions.

The sleeves are connected with the protec-' tive tube by special holdersconnected air-. tight with the latter. In order as much aspossible tolimit the admission of air through the ends of the sleeves surroundingthe rod I provide special caps which close the outer ends of the sleevesair-tight.

One illustrative embodiment of my invention and a modification thereofare represented by way of example in the accom-.

panying drawings, wherein:--

Fi re 1' shows a complete radiator in longl udinal section, and Fig. 2is a like view showing one end of, a symmetrical radiator of a modifiedform.

Referrin firstly to Fig. '1, the rod a, composed or exampleof carbon, isin the protective tube 1) which has'holders 11 eemented on its ends andispreferably made of silit,. a mass composed of silicon, carbon andnitrogen. The rod a is surrounded but not firmly held at its ends byelectricallyconducting sleeves c, c'jfitted by means of screw-threads asair-tight as possible in the holders (i, so that it can expand freelylongitudinally in both directions, and changes of shape due toexpansionare prevented The holders (1 carrymg; the protective tube areheld in the blocks e, e, composed of a resisting material, isuch ascarbon, stone,

Specification of Letters Patent. Application filed October 27,1910.BerialNo. 589,459,."

. close against the bottom of the cap parts.

In order to; prevent air entering through the PatentedJuneQfi, 191.1-

silit or the like, at the ends oi the furnace.

let into .the blocks e,.e over the ends of the sleeves c, c and in thisillustrative embodiment are made hollow and serve as cooling means. Thebottom of each cap is recessed" so that the ends of the sleeves 0, 0surrounding the rod a project into the socket-like bottoms of the capsand are effectively cooled by coldwater introduced into the caps. Thecap 71, at the one end of the rod is fitted conically, while the cap itat the other end is fitted cylindrically in its block,

an intermediate metal ring 9, g fir'mly connected with the block being",however, provided in both cases. The cylindrical cap it isscrewedair-tight to its metal ring g, while the 'co'hical cap 72, isground intoits metal ring 9. Current is su plied to the rod a'by way of the caps.The protective tube 6 and the holders'd-are able to expand owing toclearance being provided at the one end between the holder and the bot-'tom of the cap-h, while the other hd'lder is Referring now to Fi 2, theburned he ating-rod a in this modil led form of radiator can be moreconveniently exchanged without its being necessary to loosen screwed Asin the illustrative embodiment shown in Fig. 1, the rod (1 is inclosedin the protective tube 12 which is composed for example of silit,pervious to heat, but closed air-tight, and has each end mounted in aclosely-fitting sleeve 0 serving simultaneously as conductor for thecurrent. In this modification, however, eac sleeve extends aconsiderable distance beyond the end of the silit tube 6. Current is suplied by way 'of the holder d, for exampleb y means of the contact bush 5on the latter. For protoot-111g the sleeve 0" and simultaneously forclosing the radiator as air-tight as possible the protectivecap hfpreferably consisting of the same material as the holder d is screwed onthe latter. The sleeve 0. has its outer end closed by the plug 71. Inorder to exclude air still more perfectly from the tube 1) the cap h"may be so formed that a, chamber in it can be filled with liquid orplastic packing j, e. 9. oil or paraflin,

1 described, the combination of a heating-rod,

and a. non-metallic tube of considerably v 1-. In an electric radiatorof the character described, the combination of a heating-rod, and anon-metallic tube ofconsiderably greeter diameter than. the thickness ofthe rod Surrounding the latter, of an electrically-conducting sleevecarrying one end of the rod mounted free to expand axiallynt the end ofthe tube, and a cap at the end oil-the sleeve for preventing airentering into the tube;

2. In an electric radiator of the character greater diameter than thethickness of the rod surrounding the latter, of a holder fittedair-tight to one end of the tube, an electrically-conducting Sleevecarrying one end of the rod mounted free to expand axially GEORG EGLY.Witnesses:

WOLDEMAR HAUPT,

HENRY HASPER.

Copies of this patent may be obtained for five cents esch, by addressingthe Commissioner of Patents,

Washington, D. 0.

